Monster Musume and To Love-Ru. That alone makes this a hell of a season. Beyond those two, there’s a strong supporting cast of ecchi shows, making the Summer 2015 season one of the best ever.
Satoru Akahori pretty much defined ecchi in the 90s and early oughts with shows like Sorcerer Hunters, Maze, Mouse, Knights of Ramune, and Lime-iro Senkitan.
The Charmian Queen and mother of Lala/Momo/Nana takes half a day to stop by Earth and check on her daughters. Given that she is an attractive female, you can probably guess what happens.